Đáp án:
Giải thích các bước giải: $\frac{1}{2}$ + $\frac{16}{21}$ + $\frac{27}{13}$ - ( $\frac{14}{13}$ - $\frac{5}{21}$ )
= $\frac{1}{2}$ + $\frac{16}{21}$ + $\frac{27}{13}$ - $\frac{14}{13}$ + $\frac{5}{21}$
= $\frac{1}{2}$ + ($\frac{16}{21}$ + $\frac{5}{21}$) + ($\frac{27}{13}$ - $\frac{14}{13}$)
=$\frac{1}{2}$ + $\frac{21}{21}$ + $\frac{13}{13}$
=$\frac{1}{2}$ + 1 + 1 = $\frac{5}{2}$
